I highly doubt it (since they are both, what, 17?), but there are some pictures floating around online of Selena wearing a diamond ring on her engagement ring finger. They were both in Los Cabos yesterday when she was seen with the diamond ring - and immediately all of Justin Bieber's fans swore to give Selena a bloody, violent death.
Selena's reps say that they aren't engaged and they aren't in Mexico to get hitched. Sigh. And I was looking forward to a teenybopper riot.